No.4 shampoo repairs and protects hair from everyday stresses including damaged hair, split ends, and frizz by re-linking broken bonds. This shampoo leaves hair easier to manage, shinier and healthier with each use. No.4 is colour safe. 

For: All hair types especially coloured or visually damaged. 

How: Apply to wet hair, lather fully concentrating on the scalp. Rinse and condition. 

When: Daily or as needed. 

Learn more about Olaplex Bond Building technology.